157720755423 has 48 divisors (see below), whose sum is σ = 267737145984. Its totient is φ = 81665720640.

The previous prime is 157720755421. The next prime is 157720755433. The reversal of 157720755423 is 324557027751.

It is not a de Polignac number, because 157720755423 - 2¹ = 157720755421 is a prime.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157720755421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 337561 + ... + 655277.

It is an arithmetic number, because the mean of its divisors is an integer number (5577857208).

Almost surely, 2^157720755423 is an apocalyptic number.

157720755423 is a deficient number, since it is larger than the sum of its proper divisors (110016390561).

157720755423 is a wasteful number, since it uses less digits than its factorization.

157720755423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318052 (or 318045 counting only the distinct ones).

The product of its (nonzero) digits is 2058000, while the sum is 48.

The spelling of 157720755423 in words is "one hundred fifty-seven billion, seven hundred twenty million, seven hundred fifty-five thousand, four hundred twenty-three".